STMicroelectronics L6590D013TR

Overview

L6590D013TR from STMicroelectronics is a monolithic off-line switching regulator IC integrating a 700 V lateral power MOSFET, 65 kHz fixed-frequency oscillator, and 2.5 V ±2% internal reference. It delivers up to 15 W in flyback, boost, or forward topologies with secondary or primary feedback, targeting wall plug adapters and auxiliary supplies for monitors, PCs, and home appliances.

For engineers reviewing the L6590D013TR datasheet, L6590D013TR pinout, L6590D013TR application, or L6590D013TR equivalent, key selection criteria include its non-dissipative start-up circuit, standby mode (65 kHz → 22 kHz), brownout protection (SMD only), cycle-by-cycle overcurrent limiting, and latched overvoltage shutdown triggered at 16.5 V on Vcc.

Technical Context

The L6590D013TR implements voltage-mode PWM control using an internal error amplifier (70 dB DC gain, 1 MHz GBW) referenced to a precision 2.5 V bandgap. Its oscillator frequency is fixed at 65 kHz (±10%) and reduces to 22 kHz under light load via peak-current–based standby detection (80 mA/190 mA thresholds).

Protection functions are tightly integrated: brownout sensing occurs at the BOK pin (2.5 V threshold, current-hysteresis design), overvoltage protection latches at Vcc ≥16.5 V, and thermal shutdown activates at 150 °C with 40 °C hysteresis. The MOSFET features 13 Ω R_DS(on) @ 25 °C and 700 V V(BR)_DSS, with source pins internally bonded to the metal frame for enhanced thermal dissipation.

Key Specifications

Pinout & Package

The L6590D013TR is housed in a SO16W (Wide SOIC-16) package with exposed thermal pad and internally connected PGND pins (9–16) for efficient heat transfer to PCB copper. Ground pins are grouped to minimize thermal resistance (R_thj-pins = 20 °C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar off-line flyback controller applications.

Compared with ICE2A0565Z and LD7575, the L6590D013TR uniquely integrates brownout protection (BOK pin), standby frequency shifting, and a 700 V MOSFET - enabling simpler, safer, and more efficient wide-input-range flyback designs without external protection components.

Availability

L6590D013TR is available at Aetrix Electronics and suitable for wall plug adapters, monitor auxiliary supplies, and home appliance control power requiring stable component supply, long-term lifecycle support, and industrial-grade reliability.

Supply support for L6590D013TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader designing and manufacturing power management, analog, and microcontroller solutions for industrial, automotive, and consumer markets.

The L6590 series belongs to ST's off-line AC-DC controller product line, engineered specifically for compact, high-efficiency flyback converters in sub-15 W auxiliary and adapter applications with integrated protection and thermal robustness.

FAQ

What is the function of the BOK pin on the L6590D013TR?

The BOK (Brownout) pin is a dedicated input for mains undervoltage detection, available only on the SO16W package (L6590D). It features a 2.5 V threshold comparator with current hysteresis (±50 µA), allowing independent setting of turn-on and turn-off voltages via external resistor dividers. When the sensed voltage falls below threshold, PWM operation halts to prevent overheating of the primary stage during brownout conditions.

How does the standby mode reduce power consumption?

The standby mode reduces switching frequency from 65 kHz to 22 kHz when peak primary current drops below 80 mA, directly lowering gate drive and transformer core losses. At 0.5 W output, this cuts total input power to under 1 W - critical for meeting Energy Star and Blue Angel no-load consumption requirements. Frequency resumes automatically at 190 mA peak current, with 110 mA hysteresis preventing oscillation near the transition point.

Can the L6590D013TR be used with primary-side regulation only?

Yes. The L6590D013TR supports primary-side regulation using the auxiliary winding voltage for feedback, eliminating the need for an optocoupler or TL431. Its 2.5 V ±2% internal reference and high-gain error amplifier enable stable regulation with proper compensation. The COMP pin can be directly driven by a resistive divider from the auxiliary winding, simplifying isolation and reducing component count in cost-sensitive designs.

What thermal considerations apply to the SO16W package?

The SO16W package uses an internal metal frame connecting pins 9–16 (PGND) to the die substrate, achieving R_thj-pins = 20 °C/W. For 1.5 W dissipation, a minimum 3 cm² copper pour (2 oz) is required to maintain T_j ≤125 °C. High-voltage pins (e.g., DRAIN) are isolated with NC pads to meet IPC-2221 creepage requirements, and thermal vias under the exposed pad significantly improve heat transfer to inner layers.